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BeiDou Future and Evolutions
| COMPASS | |
|---|---|
| Title | BeiDou Future and Evolutions |
| Author(s) | GMV |
| Level | Basic |
| Year of Publication | 2011 |
The Compass Navigation Satellite System (CNSS), also named BeiDou-2,[1] is China’s second-generation satellite navigation system that will be capable of providing positioning, navigation, and timing services to users on a continuous worldwide basis[1][2]. Although the upgrade of its regional navigation system towards a global solution started in 1997, the formal approval by the Government of the development and deployment of BeiDou-2/CNSS was done in 2004.[1] The system is currently under development evolving from a regional system called BeiDou-1, and in the first phase will provide high-accuracy positioning services for users in China and its neighboring regions by 2012.[1] In a second stage, the system will evolve to provide global navigation services by 2020, similarly to the GPS, GLONASS or Galileo systems.[1]
COMPASS Future and Evolutions
By December 2011, the COMPASS system went into operation on a trial basis providing initial passive positioning navigation and timing services for the whole Asia-Pacific region with a constellation of 10 satellites (5 GEO satellites and 5 IGSO satellites). During 2012, the system is going to launch another 6 Beidou Navigation Satellites completing the first phase of COMPASS system by 2012[3].
The future COMPASS is expected to support two different kind of services: RDSS and RNSS.
In the Radio Determination Satellite Service (RDSS) , the user position is computed by a ground station using the round trip time of signals exchanged via GEO satellite. The RDSS Long term feature further includes[4]:
- Short message communication (guaranteeing backward compatibility with BeiDou-1)
- Large volume message communication
- Information connection
- Extended coverage
The Radio Navigation Satellite Service (RNSS) is very similar to that provided by GPS and Galileo and is designed to achieve similar performances. The global COMPASS system will be completed by 2020, with a Walker constellation of 27 MEOs plus 5 GEOs and the existing 3 IGSOs satellites of the regional system.[3][5]
The Chinese Government considers satellite navigation as strategic in the new generation information technology, and encourages international cooperation to ensure compatibility and interoperability with other navigation systems.[3]
Notes
References
- ^ a b c d e Compass Satellite Navigation System (Beidou), on Sinodefence.com, updated on August 6th, 2011.
- ^ COMPASS Navigation system in Wikipedia
- ^ a b c China Satellite Navigation Office, Development of BeiDou Navigation Satellite System, Munich Satellite Navigation Summit, 2011.
- ^ "Preliminary Results of GPS/Compass Integrated Positioning and Navigation", presented in the COMPASS Workshop held during the ION GNSS 2011 Conference.
- ^ Jun Shen, COMPASS/Beidou-China’s GNSS, BNStarNavigation Technology & System, Inc., Rome, June 11th, 2009